Hi there, Shawna!
Thanks so much for stopping by the Disney Parks Moms Panel with your great questions. I'd love to answer your questions about what is allowed inside the Disneyland Resort theme parks!
To answer your questions: yes, yes, and yes! You are more than welcome to a diaper bag, backpack, extra clothes, water, bottles, and baby snacks! In fact, this is what I always recommend to do if you bring a little into the parks so you can be prepared for anything. I also ALWAYS utilize the
convenient locker rentals in the parks. These allow you to access your locker as often as you wish throughout the day, and they make it so much easier so we don't have to carry everything at once while trying to navigate the parks. We have also brought Hydro Flasks into the parks before. You can refill them at water fountains, water bottle refilling stations, and you can also grab complimentary cups of ice water from Quick Service restaurants to fill up your water bottle.
You will also definitely want to check out the
Baby Care Centers located in each park. These offer semi-private spaces to feed and changes little ones as well as prepare bottles or baby food. They are such a lifesaver when you need a place for your infant away from the hustle and bustle. You can even purchase infant essentials such as diapers and wipes at these locations.
I hope this helps, and please return if you have any other questions as you plan your magical family vacation. Have a Fantasmic day!
-Jennifer